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12. A weight hanging by a spring from the ceiling vibrates up and down. Its vertical positionis given by s(t) = 9 sin(7t). Find the maximum speed of the weight and its position whenit reaches maximum speed A)speed = 9, position = 63 B) speed = 63, position = 0 C)speed = 7, position = 9 D)speed = 63, position = 7

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